Why Godzillas Spines changed

ZillaDude345
MemberBaragonJun-10-2019 5:12 PM(SPOILERS FOR GODZILLA AFTERSHOCK)
So Godzillas dorsal plates have changed in between Godzilla 2014, and Godzilla: KOTM. And here is why. Proceed with caution, Aftershock spoilers ahead.
During Godzillas final battle with the MUTO Prime. The MUTO Prime grabs Godzilla. And unleashes a sonic screech. And it shatters his Dorsal Plates.
And then a blue smoke starts coming out of where his Dorsal Plates used to be. He then lifts the MUTO Prime onto his back and makes a volcanic like eruption pulse out of where his spikes where and it makes the MUTO Prime blast up into the air.
He then walks over to the injured MUTO and steps on his chest killing him.
Now I have a theory about what made him get new Spines. Emma Russel explains that it's like a radioactive volcano. And what happens after a volcano erupts in the sea. It makes islands. So what happens is either two things. New adult Spines could have grown in. Or these new spikes are the result of his back volcano.
But hey its just a theory. I may be wrong. Tell me what you think is more likely. Or what you think triggered his Sudden spike change.
King and Queen of The Skies.........